KEY: S = Estimate does not meet publication standards because of high
sampling variability or poor response quality. - = Zero or Less than half the
unit shown; thus, it has been rounded to zero.

1 Ton-miles estimates are based on
estimated distances traveled along a modeled transportation network. 2 "Truck" as a single mode includes shipments that were made by
only private truck, only for-hire truck, or a combination of private truck
and for-hire truck.3 Estimates for pipeline exclude shipments of crude petroleum.

NOTES: Rows are not shown if all cells for that particular row have no
values. For example, specific state by mode rows are not shown in this table
because there are no data for those rows. Value-of-shipment estimates are
reported in current prices. More information on sampling error,
confidentiality protection, nonsampling error, sample design, and definitions
may be found at http://www.bts.gov/publications/commodity_flow_survey/.

SOURCE: U.S. Department of Transportation, Research and Innovative
Technology Administration, Bureau of Transportation Statistics and U.S.
Department of Commerce, U.S. Census Bureau, 2007 Economic Census:
Transportation Commodity Flow Survey, December 2009.